About PHSwerte
About PHSwerte
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The glass electrode (and also other Ion selective electrodes) ought to be calibrated within a medium comparable to the a single remaining investigated. As an example, if one particular wishes to measure the pH of a seawater sample, the electrode ought to be calibrated in an answer resembling seawater in its chemical composition.
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When pure drinking water is subjected to air, it turns into mildly acidic. This is because water absorbs carbon dioxide from the air, that is then slowly transformed into bicarbonate and hydrogen ions (essentially making carbonic acid).
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H+]/c0, where by the conventional condition concentration c0 = one mol/L. This ratio is a pure amount whose logarithm is often defined.
In present day chemistry, the p means "the unfavorable decimal logarithm of", and it is used in the term pKa for acid dissociation constants,[11] so pH is "the damaging decimal logarithm of H+ ion concentration", whilst pOH is "the adverse decimal logarithm of OH- ion focus".
Analog zum pH Wert existiert auch der sogenannten pOH Wert. Dieser gibt die Konzentration an -Ionen in einer Lösung an. Du kannst dir merken, dass der pH Wert addiert mit dem pOH Wert einer Lösung immer fourteen ergeben muss.
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The precise measurement of pH is offered in Global Regular ISO 31-8 as follows:[15] A galvanic mobile is ready approximately evaluate the electromotive force (e.m.file.) among a reference electrode and an electrode delicate towards the hydrogen ion action when they are both equally immersed in a similar aqueous Remedy.
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